Home / 20,371.02-28,115.51-11,878.12

Finding the Fourth Proportional to 20,371.02, 28,115.51 and 11,878.12

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Solution

The fourth proportional to 20,371.02, 28,115.51 and 11,878.12 is: 16,393.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,371.02 : 28,115.51 = 11,878.12 : x
  2. Step 2: Convert to fraction form
    20,371.02/28,115.51 = 11,878.12/x
  3. Step 3: Cross multiply
    20,371.02x = 28,115.51 × 11,878.12
  4. Step 4: Simplify right side
    20,371.02x = 333,959,298.32
  5. Step 5: Solve for x
    x = 333,959,298.32/20,371.02
  6. Step 6: Final answer
    x = 16,393.84

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.